Electricity and Magnetism Review

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as V = I × R.

Front

What happens to current when voltage increases in a circuit with constant resistance?

Back

According to Ohm's Law, if voltage increases while resistance remains constant, the current will also increase.

Front

What is the relationship between voltage and current in a series circuit?

Back

In a series circuit, the total voltage is the sum of the voltages across each component, and the current remains the same throughout the circuit.

Front

What is the relationship between voltage and current in a parallel circuit?

Back

In a parallel circuit, the voltage across each component is the same, and the total current is the sum of the currents through each component.

Front

What is static electricity?

Back

Static electricity is the accumulation of electric charge on the surface of objects, which can result from friction, leading to an imbalance of positive and negative charges.

Front

What happens when two objects with the same charge are brought near each other?

Back

Objects with the same charge repel each other.

Front

What happens when two objects with opposite charges are brought near each other?

Back

Objects with opposite charges attract each other.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core material.

Front

How do you calculate current using voltage and resistance?

Back

Current (I) can be calculated using Ohm's Law: I = V / R, where V is voltage and R is resistance.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).